Question

Aflati numarul x pentru care : a) x + 3 supra 4 = 1 ; b) 2 supra 5 + x = 2 c) x - 3 supra 5 = 2 supra 7 d) 7 supra 3 -x = 1 supra 5 e) 1 supra 3 inmultit cu x = 1 supra 4 f) x : 3 supra 4 =3

Answer 1

a)(x + 3)/4 = 1
x+3=4
x=1

b) 2/(5 + x) = 2
10+2x=2
2x=-8
x=-4


c) (x - 3)/5 = 2/7
7x-21=10
7x=31
x=31/7


d) 7/(3 -x) = 1/5
3-x=35
x=-32


e) x/3 = 1/4
4x=3
x=3/4

f) x : 3/4 =3
4x/3=3
x=9/4